On the acoustic black-hole effect in waveguides

2021 ◽  
Vol 149 (4) ◽  
pp. A108-A108
Author(s):  
Abbas Mousavi ◽  
Martin Berggren ◽  
Eddie Wadbro
Keyword(s):  
Black Hole ◽  
Hole Effect

Interpretation of the Acoustic Black Hole effect based on the concept of critical coupling

2020 ◽  
Vol 471 ◽  
pp. 115199 ◽  
Author(s):  
J. Leng ◽  
V. Romero-García ◽  
A. Pelat ◽  
R. Picó ◽  
J.-P. Groby ◽  
...  
Keyword(s):  
Black Hole ◽  
Critical Coupling ◽  
Hole Effect

Experimental investigation of the acoustic black hole effect for vibration damping in elliptical plates

2008 ◽  
Vol 123 (5) ◽  
pp. 3318-3318 ◽  
Author(s):  
François Gautier ◽  
Jacques Cuenca ◽  
Victor V. Krylov ◽  
Laurent Simon
Keyword(s):  
Experimental Investigation ◽  
Black Hole ◽  
Vibration Damping ◽  
Hole Effect

Analysis on vibration energy concentration of the one-dimensional wedge-shaped acoustic black hole structure

2018 ◽  
Vol 29 (10) ◽  
pp. 2137-2148 ◽  
Author(s):  
Xi Li ◽  
Qian Ding
Keyword(s):  
Black Hole ◽  
Strain Energy ◽  
Energy Ratio ◽  
Energy Concentration ◽  
Vibration Energy ◽  
Maximum Height ◽  
The One ◽  
Hole Structure ◽  
Hole Effect ◽  
Strain Energy Ratio

The transverse vibration energy of a plate with a wedge-shaped profile can be trapped by acoustic black hole effect to its edge portion, in case the wedge thickness is diminished according to the power-law h( x) =  εxm with m ≥ 2.0. The acoustic black hole effect exhibits potential ability for passive vibration control and energy harvesting. In this article, the transfer matrix method is adopted to establish and solve the dynamical model of acoustic black hole structure. Energy ratio is defined as a ratio of the energy trapped within the edge portion to that of the whole wedge, to illustrate the energy concentration effect. Analyses show that both the strain energy ratio and kinetic energy ratio of the acoustic black hole structure achieve the minimum when the wedge is in resonances, although these two kinds of energy come to peaks at this case. However, in the case of small length of the edge portion, the strain energy ratio reaches the highest peaks at the second and higher resonances, rather than at the first one. Generally, the best effect of energy concentration occurs when m ranges from 2.5 to 3.0. Reducing the truncation thickness and increasing the maximum height can improve the energy trapping.

scholarly journals Damping control for improvement of acoustic black hole effect

2019 ◽  
Vol 454 ◽  
pp. 63-72 ◽  
Author(s):  
Morvan Ouisse ◽  
David Renault ◽  
Pauline Butaud ◽  
Emeline Sadoulet-Reboul
Keyword(s):  
Black Hole ◽  
Damping Control ◽  
Hole Effect
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